EP0392260A1 - Recirculating ball unit with centring rods - Google Patents

Recirculating ball unit with centring rods Download PDF

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Publication number
EP0392260A1
EP0392260A1 EP90105907A EP90105907A EP0392260A1 EP 0392260 A1 EP0392260 A1 EP 0392260A1 EP 90105907 A EP90105907 A EP 90105907A EP 90105907 A EP90105907 A EP 90105907A EP 0392260 A1 EP0392260 A1 EP 0392260A1
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EP
European Patent Office
Prior art keywords
cage
centering rods
balls
ball unit
section
Prior art date
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Granted
Application number
EP90105907A
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German (de)
French (fr)
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EP0392260B1 (en
Inventor
Werner Jacob
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Individual
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Individual
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/0676—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with a bearing body or carriage almost fully embracing the guide rail or track, e.g. a circular sleeve with a longitudinal slot for the support posts of the rail
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0683—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque
    • F16C29/0685—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C29/00—Bearings for parts moving only linearly
    • F16C29/04—Ball or roller bearings
    • F16C29/06—Ball or roller bearings in which the rolling bodies circulate partly without carrying load
    • F16C29/068—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track
    • F16C29/0683—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque
    • F16C29/0685—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls
    • F16C29/0688—Ball or roller bearings in which the rolling bodies circulate partly without carrying load with the bearing body fully encircling the guide rail or track the bearing body encircles a rail or rod of circular cross-section, i.e. the linear bearing is not suited to transmit torque with balls whereby a sleeve surrounds the circulating balls and thicker part of the sleeve form the load bearing tracks

Definitions

  • the invention relates to a recirculating ball unit for a linear ball guide which can be moved along the longitudinal axis of a guide rail which is circular in cross section and which at least partially surrounds it, with a plurality of endless rows of balls distributed over the cross section, which are guided in a multi-part cage, each of which has a supporting section, in which the balls protrude radially inward from the cage and rest against the guide rail, have a return section and both deflecting sections connecting at the ends, in which the support section and return section each extend parallel to the longitudinal axis and the cage parts each form guide channels for the balls, are connected to one another via centering rods and accommodated in a base body.
  • the object of the invention is to propose a recirculating ball unit whose cage is easier to manufacture, but which has the stability required for the alignment and guidance of the balls.
  • the parts forming the cage have bores running parallel to the longitudinal axis, into which continuous centering rods are inserted which fix the cage parts relative to one another in the base body.
  • the centering rods are fixed relative to the head pieces forming an axial closure.
  • end disks are additionally provided, which are supported at the ends on the head pieces, the centering rods are fixed relative to the end disks.
  • the head pieces belonging to the cage prefferably be covered by caps centered on the ends of the base body, with respect to which the centering rods are fixed.
  • centering rods run axially through the webs of the inner segments of the cage between two adjacent supporting sections of the rows of balls.
  • a preferred fastening option for the centering rods is achieved by welding, caulking or screwing.
  • the centering rods can be fixed under pretension, as is provided according to a further proposal of the invention.
  • the recirculating ball unit 1 is used to support a table or machine part on a guide rail 2.
  • the cross-section of the guide rail 2 is designed as a circular profile and can be fastened to a base using a fastening element.
  • the guide rail 2 can be part of the fastening element or can be connected to it via suitable screw connections.
  • the recirculating ball unit 1 is slotted in cross section and partially encloses the guide rail 2.
  • the ball recirculation unit 1 has 8 rows of balls 5 distributed around the circumference. Each individual row of balls 5 consists of a support section 9, in which the balls 4 located in this section protrude radially inward from the cage 6 and rest on the outer surface 3 of the guide rail 2.
  • the balls 4 located in the support section 9 support radially on the tread 8, which is formed by the bore of the base body 7.
  • the support sections 9 of each row of balls 5 are connected to the return section 10 via deflection sections 11. In the deflection sections 11 and the return section 10, the balls 4 are guided with play without load. In these sections, the balls 4 are not in contact with the guide rail 2.
  • the support sections 9 and return sections 10 extend parallel to the longitudinal axis xx of the guide rail 2 and thus to the bore axis of the bore of the base body 7.
  • the cage 6 for guiding the balls 4 is in several parts educated.
  • the inner segments 12 which are formed by circumferentially distributed webs 12a, which form guide grooves 15, which laterally hold the balls 4 in the support sections 9 lead, and from the ends on these centered headers 13.
  • the headers 13 and the inner segments 12 form 11 guide grooves 16 in the region of the deflecting sections.
  • centering rods 17 are provided to stabilize the cage 6 and in particular the webs 12a of the inner segments 12 and the headers 13. These centering rods 17 are each inserted in bores 18 of the webs 12a of the inner segments 12 and bores 19 of the head pieces 13 corresponding thereto.
  • the bores 19 in one of the head pieces 13 can be designed as threaded bores into which the centering rods 17 are screwed with their end 28 designed as a threaded end.
  • the bores 19 of the other head piece 13 can be designed as a through hole.
  • the threaded ends 28 of the centering rods 17 are led out of this.
  • Nuts 29 are screwed onto the ends 28.
  • the cage is made up of inner segments 12 and head pieces 13. Both the head pieces 13 and the inner segments 12 each have webs 14 and 12a, which engage between adjacent support sections 9 of the balls 4 and guide the balls 4.
  • the webs 14 and 12a of the head pieces 13 and inner segments 12 are also penetrated by centering rods 17, which are received in complementary bores 18 and 19.
  • the head pieces 13 are surrounded by caps 22, which in their end face are also provided with holes 23 in which the ends 28 of the centering rods 17 are fixed.
  • the fixation can take place, for example, by jamming, caulking or by a welding spot.
  • the cap 22 is received on a centering surface 25 of the base body 7 and is axially supported with its end face 24 on the radially extending support surface 26 of the base body 7.
  • the caps 22 can be made of metal, for example. This results in an embodiment in which the base body 7 can be designed in a particularly simple manner.
  • the step bore provided at the end of the base body in the embodiment according to FIGS. 1 and 2 is omitted.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bearings For Parts Moving Linearly (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

Die Erfindung betrifft eine Kugelumlaufeinheit (1), bei der der die Kugeln (4) führende Käfig (6) aus Innensegmenten (12) und Kopfstücken (13) gebildet ist. Diese werden axial durch Zentrierstäbe (17) einandergegenüber zu einer Einheit verbunden und im Grundkörper (7) gehalten. Die Zentrierstäbe (17) können beispielsweise in den Kopfstücken (13) fixiert sein. Die Zentrierstäbe (17) erhöhen die Steifigkeit des Käfigs (6) und erlauben eine Herstellung aus Kunststoff und einwandfreie Zentrierung der Käfigteile einandergegenüber, so daß ein ungestörter Umlauf der Kugeln (4) in den Kugelreihen (5) gewährleistet ist.The invention relates to a recirculating ball unit (1), in which the cage (6) guiding the balls (4) is formed from inner segments (12) and head pieces (13). These are axially connected to one another by centering rods (17) and held in the base body (7). The centering rods (17) can, for example, be fixed in the head pieces (13). The centering rods (17) increase the rigidity of the cage (6) and allow a production of plastic and perfect centering of the cage parts, so that an undisturbed circulation of the balls (4) in the rows of balls (5) is guaranteed.

Description

Die Erfindung betrifft eine Kugelumlaufeinheit für eine Linearkugelführung, die entlang der Längsachse einer im Querschnitt kreisförmigen Führungsschiene bewegbar ist, welche sie wenigstens teilweise umschließt, mit mehreren über den Querschnitt verteilt angeordneten endlosen Kugel­reihen, die in einem mehrteiligen Käfig geführt sind, welche jeweils einen Tragabschnitt, in welchem die Kugeln radial nach innen aus dem Käfig herausragen und an der Führungsschiene anliegen, einen Rückführabschnitt und beide an den Enden verbindende Umlenkabschnitte aufweisen, bei denen sich Tragabschnitt und Rückführabschnitt jeweils parallel zur Längsachse erstrecken und wobei die Käfig­teile jeweils Führungsrinnen für die Kugeln bilden, über Zentrierstäbe miteinander verbunden und in einem Grund­körper aufgenommen sind.The invention relates to a recirculating ball unit for a linear ball guide which can be moved along the longitudinal axis of a guide rail which is circular in cross section and which at least partially surrounds it, with a plurality of endless rows of balls distributed over the cross section, which are guided in a multi-part cage, each of which has a supporting section, in which the balls protrude radially inward from the cage and rest against the guide rail, have a return section and both deflecting sections connecting at the ends, in which the support section and return section each extend parallel to the longitudinal axis and the cage parts each form guide channels for the balls, are connected to one another via centering rods and accommodated in a base body.

Bei Kugelumlaufführungen ist es bekannt, die äußeren Trag­bahnen, an denen sich die Kugeln im Tragabschnitt ab­stützen, aus einzelnen Laufbahnsegmenten zu erstellen. Die einzelnen Laufbahnensegmente sind in einem Träger aufge­nommen. Der Käfig zur Führung der Kugeln ist in der Regel einteilig ausgebildet.In the case of recirculating ball bearings, it is known to create the outer support tracks on which the balls are supported in the support section from individual track segments. The individual career segments are recorded in a carrier. The cage for guiding the balls is usually made in one piece.

Aufgabe der Erfindung ist es, eine Kugelumlaufeinheit vorzuschlagen, deren Käfig einfacher herstellbar ist, der jedoch die für die Ausrichtung und Führung der Kugeln erforderliche Stabilität besitzt.The object of the invention is to propose a recirculating ball unit whose cage is easier to manufacture, but which has the stability required for the alignment and guidance of the balls.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die den Käfig bildenden Teile parallel zur Längsachse verlau­fende Bohrungen aufweisen, in welche durchgehende Zen­trierstäbe eingesetzt sind, die die Käfigteile einander gegenüber im Grundkörper fixieren.This object is achieved in that the parts forming the cage have bores running parallel to the longitudinal axis, into which continuous centering rods are inserted which fix the cage parts relative to one another in the base body.

Durch diese Ausbildung ist es möglich,den Käfig aus Kunst­stoff herzustellen und trotzdem, daß dieser aus verschie­denen Segmenten und Einzelteilen zusammengesetzt ist, die für eine sichere Führung der Kugeln erforderliche Steifig­keit zu erreichen.With this design, it is possible to manufacture the cage from plastic, and nevertheless that it is composed of different segments and individual parts, to achieve the rigidity required for reliable guidance of the balls.

Es sind verschiedene Befestigungsvarianten für die Zen­trierstäbe je nach Ausführung der Kugelumlaufeinheit mög­lich. Nach einem ersten Ausführungsbeispiel der Erfindung ist vorgesehen, daß die Zentrierstäbe gegenüber den einen axialen Abschluß bildenden Kopfstücken fixiert sind. Für den Fall, daß zusätzlich noch Endscheiben vorgesehen sind, die endseitig an den Kopfstücken abgestützt sind, sind die Zentrierstäbe gegenüber den Endscheiben fixiert.Various mounting options for the centering rods are possible depending on the design of the recirculating ball unit. According to a first embodiment of the invention it is provided that the centering rods are fixed relative to the head pieces forming an axial closure. In the event that end disks are additionally provided, which are supported at the ends on the head pieces, the centering rods are fixed relative to the end disks.

Es ist auch möglich, daß die zum Käfig gehörenden Kopf­stücke von an den Enden des Grundkörpers zentrierten Kap­pen überdeckt sind, gegenüber denen die Zentrierstäbe fixiert sind.It is also possible for the head pieces belonging to the cage to be covered by caps centered on the ends of the base body, with respect to which the centering rods are fixed.

Bevorzugt ist vorgesehen, daß die Zentrierstäbe durch die Stege der Innensegmente des Käfigs zwischen zwei benachbarten Tragabschnitten der Kugelreihen axial hindurchverlaufen. Bei dieser Anordnung wird die Stabilität des Käfigs in Umfangsrichtung besonders verstärkt.It is preferably provided that the centering rods run axially through the webs of the inner segments of the cage between two adjacent supporting sections of the rows of balls. With this arrangement, the stability of the cage in the circumferential direction is particularly enhanced.

Eine bevorzugte Befestigungsmöglichkeit der Zentrierstäbe wird durch Schweißen, Verstemmen oder Verschrauben er­reicht.A preferred fastening option for the centering rods is achieved by welding, caulking or screwing.

Zur weiteren Erhöhung der Steifigkeit können, wie nach einem weiteren Vorschlag der Erfindung vorgesehen ist, die Zentrierstäbe unter Vorspannung fixiert sein.To further increase the rigidity, the centering rods can be fixed under pretension, as is provided according to a further proposal of the invention.

Bevorzugte Ausführungsbeispiele der Erfindung sind in der Zeichnung schematisch dargestellt.Preferred embodiments of the invention are shown schematically in the drawing.

Es zeigt

  • Figur 1 eine erste Ausführungsform mit einer ge­schlitzen Version des Grundkörpers und einem aus Segmenten aufgebauten Käfig im Quer­schnitt (Schnitt C-C gemäß Figur 2),
  • Figur 2 in der rechten und linken Hälfte jeweils unterschiedliche Längsschnitte, und zwar entspricht der Schnitt 2a dem Schnitt A-A gemäß Figur 1 und die rechte Hälfte (Figur 2b) dem Schnitt B-B gemäß Figur 1,
  • Figur 3 eine alternative Ausführungsform bei der die Kopfstücke durch Kappen überdeckt sind, wobei jeweils die Teilschnitte 3a,3b und 3c Schnit­te gemäß Figur 4 nach den Linien A-A, B-B, C-C darstellen,
  • Figur 4 einen Querschnitt durch eine Ausführungsform nach Figur 3,
  • Figur 5 ein Detail X gemäß Figur 3 in vergrößerter Darstellung.
It shows
  • 1 shows a first embodiment with a slotted version of the base body and a cage constructed from segments in cross section (section CC according to FIG. 2),
  • 2 in the right and left halves each have different longitudinal sections, namely section 2a corresponds to section AA according to FIG. 1 and the right half (FIG. 2b) corresponds to section BB according to FIG. 1,
  • 3 shows an alternative embodiment in which the head pieces are covered by caps, the partial sections 3a, 3b and 3c each representing sections according to FIG. 4 along the lines AA, BB, CC,
  • FIG. 4 shows a cross section through an embodiment according to FIG. 3,
  • Figure 5 shows a detail X according to Figure 3 in an enlarged view.

Die Kugelumlaufeinheit 1 gemäß den Figuren 1 und 2 dient zur Lagerung eines Tisches oder Maschinenteils auf einer Führungsschiene 2. Die Führungsschiene 2 ist im Quer­schnitt als Kreisprofil ausgebildet und über ein Befesti­gungselement auf einer Unterlage befestigbar. Die Führungsschiene 2 kann Bestandteil des Befestigungsele­mentes sein oder aber mit diesem über geeignete Schraub­verbindungen verbunden sein. Die Kugelumlaufeinheit 1 ist im Querschnitt geschlitzt ausgeführt und umschließt die Führungsschiene 2 teilweise. Die Kugelumlaufeinheit 1 besitzt 8 umfangsverteilt angeordnete Kugelreihen 5. Jede einzelne Kugelreihe 5 besteht aus einem Tragabschnitt 9, in welchem die sich in diesem Abschnitt befindlichen Ku­geln 4 aus dem Käfig 6 radial nach innen herausragen und auf der Außenfläche 3 der Führungsschiene 2 anliegen. Ferner stützen die sich im Tragabschnitt 9 befindlichen Kugeln 4 an der Lauffläche 8, die von der Bohrung des Grundkörpers 7 gebildet ist, radial ab. Über Umlenkab­schnitte 11 sind die Tragabschnitte 9 jeder Kugelreihe 5 mit dem Rückführabschnitt 10 verbunden. In den Umlenkab­schnitten 11 und dem Rückführabschnitt 10 sind die Kugeln 4 lastfrei mit Spiel geführt. In diesen Abschnitten stehen die Kugeln 4 nicht in Berührung mit der Führungsschiene 2. Die Tragabschnitte 9 und Rückführabschnitte 10 erstrecken sich parallel zur Längsachse x-x der Führungsschiene 2 und damit zur Bohrungsachse der Bohrung des Grundkörpers 7. Der Käfig 6 zur Führung der Kugeln 4 ist mehrteilig ausge­bildet. Er besteht aus den Innensegmenten 12, welche durch umfangsverteilte Stege 12a, welche Führungsrinnen 15 bil­den, die die Kugeln 4 in den Tragabschnitten 9 seitlich führen, und aus den endseitig an diesen zentrierten Kopf­stücken 13. Die Kopfstücke 13 und die Innensegmente 12 bilden im Bereich der Umlenkabschnitte 11 Führungsrinnen 16. Zur Stabilisierung des Käfigs 6 und insbesondere der Stege 12a der Innensegmente 12 sowie der Kopfstücke 13 sind Zentrierstäbe 17 vorgesehen. Diese Zentrierstäbe 17 sind jeweils in Bohrungen 18 der Stege 12a der Innenseg­mente 12 sowie dazu korrespondierenden Bohrungen 19 der Kopfstücke 13 eingesetzt. Die Bohrungen 19 in einem der Kopfstücke 13 können als Gewindebohrungen ausgebildet sein, in welche die Zentrierstäbe 17 mit ihrem als Gewin­deende ausgebildeten Ende 28 eingeschraubt sind. Die Bohrungen 19 des anderen Kopfstückes 13 können als Durch­gangsbohrung gestaltet sein. Aus diesem sind die Gewinde­enden 28 der Zentrierstäbe 17 herausgeführt. Auf die Enden 28 sind Muttern 29 aufgeschraubt. Durch Festziehen der Muttern 29 werden die Innensegmente 12 und die Kopfstücke 13 gegeneinander verspannt. Hierdurch wird auch der aus diesen Teilen bestehende Käfig 6 im Grundkörper 7 axial festgelegt. Die Innensegmente 12 und Kopfstücke 13 sind endseitig in vergrößerten Bohrungsabschnitten des Grund­körpers 7 aufgenommen und stützen sich entsprechend an den axialen Endflächen dieser vergrößerten Bohrungsabschnitte ab.The recirculating ball unit 1 according to FIGS. 1 and 2 is used to support a table or machine part on a guide rail 2. The cross-section of the guide rail 2 is designed as a circular profile and can be fastened to a base using a fastening element. The guide rail 2 can be part of the fastening element or can be connected to it via suitable screw connections. The recirculating ball unit 1 is slotted in cross section and partially encloses the guide rail 2. The ball recirculation unit 1 has 8 rows of balls 5 distributed around the circumference. Each individual row of balls 5 consists of a support section 9, in which the balls 4 located in this section protrude radially inward from the cage 6 and rest on the outer surface 3 of the guide rail 2. Furthermore, the balls 4 located in the support section 9 support radially on the tread 8, which is formed by the bore of the base body 7. The support sections 9 of each row of balls 5 are connected to the return section 10 via deflection sections 11. In the deflection sections 11 and the return section 10, the balls 4 are guided with play without load. In these sections, the balls 4 are not in contact with the guide rail 2. The support sections 9 and return sections 10 extend parallel to the longitudinal axis xx of the guide rail 2 and thus to the bore axis of the bore of the base body 7. The cage 6 for guiding the balls 4 is in several parts educated. It consists of the inner segments 12, which are formed by circumferentially distributed webs 12a, which form guide grooves 15, which laterally hold the balls 4 in the support sections 9 lead, and from the ends on these centered headers 13. The headers 13 and the inner segments 12 form 11 guide grooves 16 in the region of the deflecting sections. To stabilize the cage 6 and in particular the webs 12a of the inner segments 12 and the headers 13, centering rods 17 are provided. These centering rods 17 are each inserted in bores 18 of the webs 12a of the inner segments 12 and bores 19 of the head pieces 13 corresponding thereto. The bores 19 in one of the head pieces 13 can be designed as threaded bores into which the centering rods 17 are screwed with their end 28 designed as a threaded end. The bores 19 of the other head piece 13 can be designed as a through hole. The threaded ends 28 of the centering rods 17 are led out of this. Nuts 29 are screwed onto the ends 28. By tightening the nuts 29, the inner segments 12 and the head pieces 13 are braced against each other. As a result, the cage 6 consisting of these parts is axially fixed in the base body 7. The inner segments 12 and head pieces 13 are received at the end in enlarged bore sections of the base body 7 and are supported accordingly on the axial end faces of these enlarged bore sections.

Bei der Ausführungsform nach den Figuren 3 bis 5 ist der Käfig aus Innensegmenten 12 sowie Kopfstücken 13 aufge­baut. Sowohl die Kopfstücke 13 als auch die Innensegmente 12 besitzen jeweils Stege 14 bzw. 12a, die zwischen be­nachbarte Tragabschnitte 9 der Kugeln 4 eingreifen und die Kugeln 4 führen. Die Stege 14 und 12a der Kopfstücke 13 und Innensegmente 12 werden ebenfalls von Zentrierstäben 17, die in sich ergänzenden Bohrungen 18 und 19 aufgenom­men sind, durchdrungen. Zusätzlich sind die Kopfstücke 13 von Kappen 22 umschlossen, welche in ihrer Stirnfläche ebenfalls mit Bohrungen 23 versehen sind, in denen die Enden 28 der Zentrierstäbe 17 fixiert sind. Die Fixierung kann beispielsweise durch Verklemmen, Verstemmen oder durch einen Schweißpunkt erfolgen. Die Kappe 22 ist auf einer Zentrierfläche 25 des Grundkörpers 7 aufgenonmen und mit ihrer Stirnfläche 24 an der radial verlaufenden Stützfläche 26 des Grundkörpers 7 axial abgestützt.In the embodiment according to FIGS. 3 to 5, the cage is made up of inner segments 12 and head pieces 13. Both the head pieces 13 and the inner segments 12 each have webs 14 and 12a, which engage between adjacent support sections 9 of the balls 4 and guide the balls 4. The webs 14 and 12a of the head pieces 13 and inner segments 12 are also penetrated by centering rods 17, which are received in complementary bores 18 and 19. In addition, the head pieces 13 are surrounded by caps 22, which in their end face are also provided with holes 23 in which the ends 28 of the centering rods 17 are fixed. The fixation can take place, for example, by jamming, caulking or by a welding spot. The cap 22 is received on a centering surface 25 of the base body 7 and is axially supported with its end face 24 on the radially extending support surface 26 of the base body 7.

Die Kappen 22 können beispielsweise aus Metall hergestellt sein. Hierdurch ergibt sich eine Ausführungsform, bei der der Grundkörper 7 besonders einfach gestaltet werden kann. Die am Ende des Grundkörpers bei der Ausführungsform nach den Figuren 1 und 2 vorgesehene Stufenbohrung entfällt.The caps 22 can be made of metal, for example. This results in an embodiment in which the base body 7 can be designed in a particularly simple manner. The step bore provided at the end of the base body in the embodiment according to FIGS. 1 and 2 is omitted.

BezugszeichenlisteReference symbol list

  • 1 Kugelumlaufeinheit1 recirculating ball unit
  • 2 Führungsschiene2 guide rails
  • 3 Außenfläche der Führungsschiene3 outer surface of the guide rail
  • 4 Kugeln4 balls
  • 5 Kugelreihen5 rows of balls
  • 6 Käfig6 cage
  • 7 Grundkörper7 basic body
  • 8 Lauffläche im Grundkörper8 tread in the base
  • 9 Tragabschnitt9 support section
  • 10 Rückführabschnitt10 return section
  • 11 Umlenkabschnitt11 deflection section
  • 12 Innensegmente12 inner segments
  • 12a Stege der Innensegmente12a webs of the inner segments
  • 13 Kopfstücke13 head pieces
  • 14 Stege der Kopfstücke14 bars of the head pieces
  • 15,16 Führungsrinnen15.16 guide channels
  • 17 Zentrierstäbe17 centering rods
  • 18 Bohrung in Innensegmenten18 bore in inner segments
  • 19 Bohrung in Kopfstück19 hole in head piece
  • 2020th
  • 2121st
  • 22 Kappe22 cap
  • 23 Bohrung in Kappe23 hole in cap
  • 24 Stirnfläche der Kappe24 end face of the cap
  • 25 Zentrierfläche am Grundkörper25 centering surface on the base body
  • 26 Stützfläche des Grundkörpers26 support surface of the base body
  • 27 Kragen des Grundkörpers27 collar of the base body
  • 28 Ende der Zentrierstange28 end of the centering rod
  • 29 Mutter29 mother
  • X-X LängsachseX-X longitudinal axis

Claims (7)

1. Kugelumlaufeinheit für eine Linearkugelführung, die entlang der Längsachse einer im Querschnitt kreisför­migen Führungsschiene bewegbar ist, welche sie wenig­stens teilweise umschließt, mit mehreren über den Querschnitt verteilt angeordneten endlosen Kugel­reihen, die in einem mehrteiligen Käfig geführt sind, welche jeweils einen Tragabschnitt, in welchem die Kugeln radial nach innen aus dem Käfig herausragen und an der Führungsschiene anliegen, einen Rückführab­schnitt und beide an den Enden verbindende Umlenkab­schnitte aufweisen, bei denen sich Tragabschnitt und Rückführabschnitt jeweils parallel zur Längsachse erstrecken und wobei die Käfigteile jeweils Führungs­rinnen für die Kugeln bilden, über Zentrierstäbe miteinander verbunden und in einem Grundkörper aufge­nommen sind,
dadurch gekennzeichnet,
daß die den Käfig (6) bildenden Teile (12,13) parallel zur Längsachse (x-x) verlaufende Bohrungen (18,19) aufweisen, in welche durchgehende Zentrierstäbe (17) eingesetzt sind, die die Käfigteile (12,13) einander­gegenüber im Grundkörper (7) axial fixieren.1. Ball recirculation unit for a linear ball guide, which is movable along the longitudinal axis of a guide rail with a circular cross section, which at least partially surrounds it, with a plurality of endless rows of balls distributed over the cross section, which are guided in a multi-part cage, each of which has a supporting section in which the balls protrude radially inward from the cage and rest against the guide rail, have a return section and both end sections connecting the return sections, in which the support section and return section each extend parallel to the longitudinal axis and the cage parts each form guide grooves for the balls, via centering rods connected to one another and accommodated in a base body,
characterized,
that the parts (12, 13) forming the cage (6) have bores (18, 19) running parallel to the longitudinal axis (xx), into which continuous centering rods (17) are inserted, which separate the cage parts (12, 13) in the base body (7) fix axially. 2. Kugelumlaufeinheit nach Anspruch 1,
dadurch gekennzeichnet,
daß die Zentrierstäbe (17) gegenüber den einen axialen Abschluß bildenden Kopfstücken (13) fixiert sind.2. recirculating ball unit according to claim 1,
characterized,
that the centering rods (17) are fixed relative to the head pieces (13) forming an axial closure. 3. Kugelumlaufeinheit nach Anspruch 2,
dadurch gekennzeichnet,
daß die Zentrierstäbe (17) gegenüber Endscheiben fixiert sind, die endseitig an den Kopfstücken (13) abgestützt sind.3. recirculating ball unit according to claim 2,
characterized,
that the centering rods (17) are fixed relative to end disks, which are supported at the ends on the head pieces (13). 4. Kugelumlaufeinheit nach Anspruch 1,
dadurch gekennzeichnet,
daß die zum Käfig (6) gehörenden Kopfstücke (13) von an den Enden des Grundkörpers (7) zentrierten Kappen (22) überdeckt sind, gegenüber denen die Zentrierstäbe (17) fixiert sind.4. recirculating ball unit according to claim 1,
characterized,
that the head pieces (13) belonging to the cage (6) are covered by caps (22) centered on the ends of the base body (7), with respect to which the centering rods (17) are fixed. 5. Kugelumlaufeinheit nach Anspruch 1,
dadurch gekennzeichnet,
daß die Zentrierstäbe (17) durch die Stege (12a) der Innensegmente (12) des Käfigs zwischen zwei benach­barten Tragabschnitten (9) der Kugelreihen (5) axial hindurchverlaufen.5. recirculating ball unit according to claim 1,
characterized,
that the centering rods (17) axially pass through the webs (12a) of the inner segments (12) of the cage between two adjacent support sections (9) of the rows of balls (5). 6. Kugelumlaufeinheit nach einem oder mehreren der An­sprüche 1 bis 5,
dadurch gekennzeichnet,
daß die Zentrierstäbe (17) durch Schweißen, Verstemmen oder Verschrauben fixiert sind.6. recirculating ball unit according to one or more of claims 1 to 5,
characterized,
that the centering rods (17) are fixed by welding, caulking or screwing. 7. Kugelumlaufeinheit nach einem oder mehreren der An­sprüche 1 bis 6,
dadurch gekennzeichnet,
daß die Zentrierstäbe (17) unter Vorspannung fixiert sind.7. recirculating ball unit according to one or more of claims 1 to 6,
characterized,
that the centering rods (17) are fixed under prestress.
EP90105907A 1989-04-08 1990-03-28 Recirculating ball unit with centring rods Expired - Lifetime EP0392260B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3911501 1989-04-08
DE3911501 1989-04-08
DE3937782A DE3937782A1 (en) 1989-04-08 1989-11-14 BALL REVERSE UNIT WITH CENTERING RODS
DE3937782 1989-11-14

Publications (2)

Publication Number Publication Date
EP0392260A1 true EP0392260A1 (en) 1990-10-17
EP0392260B1 EP0392260B1 (en) 1994-06-29

Family

ID=25879704

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105907A Expired - Lifetime EP0392260B1 (en) 1989-04-08 1990-03-28 Recirculating ball unit with centring rods

Country Status (5)

Country Link
US (1) US4974969A (en)
EP (1) EP0392260B1 (en)
JP (1) JPH0366918A (en)
DE (1) DE3937782A1 (en)
ES (1) ES2056281T3 (en)

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DE102006053998A1 (en) * 2006-11-16 2008-05-21 Schaeffler Kg Linear rolling bearing for axial movement on a circular cross-section guide rail

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JPH0755278B2 (en) * 1984-06-19 1995-06-14 松下電器産業株式会社 Washing machine lid switch
JP2872839B2 (en) * 1991-09-02 1999-03-24 日本トムソン株式会社 Small linear motion rolling guide unit
DE4202746A1 (en) * 1992-01-31 1993-08-05 Schaeffler Waelzlager Kg Recirculating ball unit for linear bearings
DE4119135A1 (en) * 1991-06-11 1992-12-17 Schaeffler Waelzlager Kg Linear ball bearing with ball cage made of plastics - has arrangement of longitudinal grooves t enable balls to circulate
DE4231112C2 (en) * 1992-06-10 2003-05-15 Ina Schaeffler Kg Ball bearings for longitudinal movements
DE4234714C2 (en) * 1992-06-10 2003-05-22 Ina Schaeffler Kg Ball bearings for longitudinal movements
DE4218981C2 (en) * 1992-06-10 1999-11-18 Schaeffler Waelzlager Ohg Ball bearings for longitudinal movements
DE4428558A1 (en) * 1994-08-12 1996-02-15 Schaeffler Waelzlager Kg Guide rail for carriage in manipulating machine or robot
JP4627414B2 (en) * 2003-12-25 2011-02-09 Ｔｈｋ株式会社 Actuator and motion guide device

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Also Published As

Publication number Publication date
DE3937782C2 (en) 1993-07-08
ES2056281T3 (en) 1994-10-01
EP0392260B1 (en) 1994-06-29
JPH0366918A (en) 1991-03-22
US4974969A (en) 1990-12-04
DE3937782A1 (en) 1990-10-11

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